* Forces are vectors: They have both magnitude (strength) and direction.
* Net force: This is the overall force acting on an object. It's found by adding up all the individual forces, taking their directions into account. This might involve using vector addition.
* Newton's Second Law: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
Example:
Imagine you're pushing a box to the right with a force of 10 Newtons, while someone else is pushing it to the left with a force of 5 Newtons.
* The force to the right is stronger.
* The net force is 10 N - 5 N = 5 N to the right.
* The box will accelerate to the right.
Key takeaway: The body will move in the direction of the net force, regardless of the individual forces acting upon it.
